Many indigenous people were concerned when the French lost control of North American territory after the French and Indian War primarily because they were worried about how it might hurt the fur trade. The French had established trade relationships with many indigenous groups, and their departure created uncertainty about future trade and alliances, especially with the British, who had different policies and approaches towards trading and treaties with indigenous peoples.
Additionally, many indigenous people were also concerned about the potential for increased British expansion into their territories, which could lead to conflicts and loss of their lands. Although the concern about British revenge for siding with the French was also a factor, the overall impact on trade relationships was a significant concern for indigenous communities at that time.